This feature was originally created in the late 1990s and has been on Acrobat since 2002. Security enablers are a form of cross-protocol automation or “automation,” which enables a user to send, receive, encrypt, retrieve, or store information among different software programs and devices. Secure file encryption allows people running various types of software including desktop programs like Adobe Acrobat to send/receive/store files securely on the same computer. When a PDF is opened in an application like Acrobat, it may not be visible to people running other applications. To solve this problem, the PDF is encrypted using an AES-256 symmetric encryption key. The user who is doing the opening and reading of the file in question must use the file's AES-256 key to encrypt it. Security Envelope User Info: The user who is opening this PDF file on their Windows or Mac PC must be a member of the local Administrators group. It is very important that this user has a user ID, and the user ID does not come from AD (you can generate a User ID for the account and use it with Security Envelope). It's also important that the user has a password, and they should know how to create these passwords — you should know if they know how to encrypt their password, because that's how they'll be encrypting the document(s) themselves. Security Envelope User Password: Use a random, 8 (8-digit) character number. The user's password should be at least 6 characters long. The email address of the user should contain a symbol, and it's important that the email address be unique. The email address of the user should not contain any spaces or other special characters. The email address has to begin with the user's user ID. The email address should contain only alphanumeric characters, hyphen (-) and underscore (_). Only alphanumeric characters should be used. The email address should be case-insensitive. The security envelope needs to be encrypted by your account manager using your User ID, password, and email address. If the account manager is not the user running the PDF opening application at that moment, they should be able to get the password and decrypt the PDF. This password is encrypted by the user's account manager. The user's password will never be shown to other users or administrators.